/*
Source : https://leetcode.com/problems/basic-calculator/
Author : nflush@outlook.com
Date   : 2016-07-15
*/

/*
224. Basic Calculator
 ?  

Question Editorial Solution  
 My Submissions 




?Total Accepted: 31216
?Total Submissions: 134671
?Difficulty: Hard



Implement a basic calculator to evaluate a simple expression string.

The expression string may contain open ( and closing parentheses ), the plus + or minus sign -, non-negative integers and empty spaces .

You may assume that the given expression is always valid.

Some examples:

"1 + 1" = 2
" 2-1 + 2 " = 3
"(1+(4+5+2)-3)+(6+8)" = 23



Note: Do not use the eval built-in library function. 



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*/
class Solution {
private:
    int calculateIn(const string &s, int pos) {
        int ret = 0;
        int cur = 0;
        int m = 1;
        while(s[pos])
        return 0;
    }
public:
    int calculate(string s) {
        return 0;
    }
};
